RODUCT DESCRIPTION
Steam turbine is a kind of power equipment that converts steam heat energy into rotary mechanical energy. It is most commonly used to drive generators to generate electricity and can also replace electric motors to directly drive pumps, fans, compressors and other shaft rotating equipment.
According to the thermodynamic system, steam turbines are mainly divided into backpressure type, condensing type, extraction condensing type, extraction backpressure type, etc.
According to the rating of inlet steam parameter, the steam turbine also canbe divided into hi-temperature & hi-pressure or hi-temperature & ultra-high pressure type, medium temperature & medium-pressure type, low parameter inlet steam type.
The extraction condensing type steam turbine is design based on the condensing type steam turbine, the additional adjusted extraction pressure steam from steam turbine will be trans by pipeline for process steam applications.
The extraction condensing type is widely use in industries included cement mills, steel mills, printing and dyeing mills, chemical industry, petrochemical industry, refuse incinerating power plant, waste heat power plant, power plant, etc. that need large amount electricity consumption or output and with little or no heat energy consumption.
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The condensing type steam turbine has a relatively complex thermodynamic system, there is a phase change by steam condensing to water, and then constitute a complete Rankine cycle with boiler system.
The extraction condensing type steam turbine is design based on the condensing type steam turbine, the additional adjusted extraction pressure steam from steam turbine will be trans by pipeline for process steam applications.
These two types of steam turbine are widely use in industries included cement mills, steel mills, printing and dyeing mills, chemical industry, petrochemical industry, refuse incinerating power plant, waste heat power plant, power plant, etc. that need large amount electricity consumption or output and with little or no heat energy consumption. |
OUR TECHNICAL ADVANTAGE
High Efficiency Ratio - The steam turbine mostly designed to multi-stage small enthalpy drop impulse type, generally have 2 to 4 stages more than traditional design models: this design arranged more stage and reduced the distance between each flow stage by adjusting the distribution of enthalpy drop, by decreased impeller diameter and increased blade height in each stage of steam turbine to reduce the interstage losses; also optimized the design of the blades, nozzles, and diaphragm nozzles profile, effectively reducing the frictional heat loss of the steam turbine, thereby improving the thermal-mechanical conversion efficiency (internal efficiency) of the steam turbine. The actual operating steam consumption rate is relatively lower, and the internal efficiency is at least 5-10% higher than traditional design models.
Wide Governing Range - The governing stage of steam turbine adopted a step-by-step regulation method to make the inlet regulation range of steam turbine more widely, and more suitable for variable operating conditions and overload operation of steam turbine.
Lower Vibration Value and Noise Level - The final rotor assembly of the steam turbine is a rigid solidly forged with CNC precision machining rotor. Compared with traditional flexible assembly rotors, the operating vibration value & failure rate of our products are significantly lower than other manufacturers' traditional models. The vibration value of the bearing pads of our units that have been put into operation are all within 0.02mm, and noise under 80dB by 1 meter distance away from the unit.
Less Steam Leakage- The steam chest & casings of the steam turbine are integrally cast and formed, the structure optimized design as horizontal split overall spherical structure is more reasonable and compact, with uniform thermal expansion and less deformation that cannot cause steam leakage on the horizontal split of the casings; The shaft gland seal system adopts axial flow labyrinth type with expansion compensation device, combined with the patented design of a reverse pressure steam seal compensation device, which has advantage of low friction on the main shaft, and steam leakage during operation have reducted more than 50% compared to traditional models, it greatly improving the safety and economy of unit operation.
More Safety & Sensitive For Governing System - Digital Electro-hydraulic Control governing (DEH) and emergency trip system (ETS) adopted separate high-pressure wear-resistant (flame resistant) oil supply system (EH), it has the characteristics of sensitive response, good stability, and low failure rate. Compared to regulation and crisis security system with low-pressure lube-oil supply, the actuator has high pulling force with high adjustment accuracy and is not easy to jamming, ETS has fast emergency trip response speed, this application eliminates the hidden failures of control hydraulic oil system caused by water emulsification and deterioration in the shared lubricating oil system.
Quickly Start-up - The high-temperature high-pressure and high-temperature ultra-high-pressure units adopt casing sleeve design of high-pressure inner casing and outer casing, this application can adapt thermal expansion of casing under startup, shutdown, and variable operating conditions, so the warm-up speed of the unit is fast, and the startup time can be reduced by more than one-third compared to traditional single casing models, greatly reducing the steam consumption during the startup of the steam turbine, thus reducing the operating cost of the unit.
Low cost of construction and operation - Due to compact structure, modular design, and small volume weight, the unit also has advantage of convenient installation and maintenance with low cost on construction & operation.
TECHNICAL FEATURES
Hi-temperature & Hi-pressure/ Hi-temperature & Ultra-high Pressure Type
Capacity: 6MW to 20MW
Inlet Steam Pressure: 8.83MPa-a to 13.24MPa-a; Inlet steam temperature: 510 to 535Deg.C;
Extraction Pressure: 0.49MPa-a to 1.27MPa-a;
Pressure of Condenser: 0.007MPa-a to 0.0055MPa-a (Water cooling); 0.02MPa-a to 0.01MPa-a (Air cooling)
Supporting Steam Boiler Parameters: 9.8MPa-a to 13.7MPa-a; 510 to 540Deg.C
Double Sleeve Cylinder Design: High-pressure inner cylinder mounted in outer cylinder
Construction: Single flow, multi-stage solid rotor, horizontal spindle, two bearings
Rated Rotating Speed: 3000rpm direct coupling to generator ; 6000/3000rpm (Special specifications)
Vibration VALUE: rated speed≤0.03mm ; critical speed≤0.15mm
Governing System (DEH+EH): Speed swing value: ≤15rpm; Speed governing droop: 4.5±0.5%; Speed regulation delay rate: ≤0.5%; Droop of exhaust pressure: 10%; Exhaust pressure delay rate: ≤2%
Emergency Trip (ETS): Overspeed: Overspeed:
Overspeed: 110% ~112% of rated speed@mechanical, 105% ~106% of rated speed@electrical; Axial displacement: alarm@±0.8mm,trip@±1.0mm; Low pressure of lube-oil: [email protected], AC oil pump start@ 0.05Mpa-g, DC oil pump [email protected], [email protected], Electric turning gear [email protected]; High-temperature of bearing: metal: alarm@90°C, trip@105°C/return oil: alarm@65°C, trip@75°C; Cylinder expansion diff.: alarm@-1mm & 3.5mm; [email protected] & 4.0mm
| TYPICAL TECHNICAL PARAMETER FOR REFERENCE |
| MODEL |
CAPACITY
(MW) |
INLET STEAM PARAMETERS |
EXTACTION STEAM
PARAMETERS |
EXHAUST STEAM
PARAMETERS |
STEAM
RATE
(kg/kW·h) |
SPEED
(rpm) |
LAYOUT |
REMARKS |
FLOW
(t/h) |
PRESS.
(Mpa) |
TEMP.
(ºC) |
FLOW
(t/h) |
PRESS.
(Mpa) |
TEMP.
(ºC) |
PRESS.
(Mpa) |
TEMP.
(ºC) |
| C4.8-8.83/0.6 |
4.8 |
25 |
8.83 |
535 |
12 |
0.6 |
253.6 |
0.007 |
39.02 |
5.142 |
6000/3000 |
Double |
Temp. of boiler feed
water 158ºC |
| C15-6.5/1.2 |
15 |
105.3 |
6.5 |
470 |
75 |
1.2 |
276 |
0.0065 |
37.7 |
7.02 |
3000 |
Double |
|
| C15-6.5/1.3 |
14.9 |
110 |
6.5 |
470 |
79 |
1.3 |
275.44 |
0.0065 |
37.7 |
7.35 |
3000 |
Double |
|
| C15-8.83/0.981 |
14.9 |
75 |
8.83 |
535 |
23 |
0.981 |
280.4 |
0.007 |
39.02 |
5.028 |
3000 |
Double |
Temp. of boiler feed
water 215ºC |
| C18-8.83/1.27 |
18 |
99.9 |
8.83 |
535 |
45 |
1.27 |
292.7 |
0.0053 |
33.7 |
5.55 |
3000 |
Double |
Temp. of boiler feed
water 215ºC |
Medium Temperature & Medium Pressure Type
Capacity: 6MW to 20MW
Inlet Steam Pressure:2.35MPa-a to 4.9 MPa-a; Inlet steam temperature: 390 to 435Deg.C
Extraction Pressure: 0.49MPa-a to 1.27MPa-a;
Pressure of Condenser: 0.007MPa-a to 0.0065MPa-a (Water cooling); 0.013MPa-a to 0.02MPa-a (Air cooling)
Supporting Steam Boiler Parameters: 2.5MPa-a to 5.4MPa-a; 400 to 450Deg.C
Construction: Single flow, multi-stage solid rotor, horizontal spindle, two bearings
Rated Rotating Speed: 3000rpm direct coupling to generator ; 6000/3000rpm (Special specifications)
Vibration Value: rated speed≤0.03mm ; critical speed≤0.15mm
Governing System (DEH+EH): Speed swing value: ≤15rpm; Speed governing droop: 4.5±0.5%; Speed regulation delay rate: ≤0.5%; Droop of exhaust pressure: 10%; Exhaust pressure delay rate: ≤2%
Emergency Trip (ETS): Overspeed: 110% ~112% of rated speed@mechanical, 105% ~106% of rated speed@electrical; Axial displacement trip@±0.7mm; Low pressure of lube-oil:
[email protected], Oil pump start@ 0.04Mpa-g,
[email protected], Electric turning gear
[email protected]; High-temperature of bearing: metal: alarm@85°C, trip@100°C/ return oil: alarm@65°C, trip@70°C
| TYPICAL TECHNICAL PARAMETER FOR REFERENCE |
| MODEL |
CAPACITY
(MW) |
INLET STEAM PARAMETERS |
EXTACTION STEAM
PARAMETERS |
EXHAUST STEAM
PARAMETERS |
STEAM
RATE
(kg/kW·h) |
SPEED
(rpm) |
LAYOUT |
REMARKS |
FLOW
(t/h) |
PRESS.
(Mpa) |
TEMP.
(ºC) |
FLOW
(t/h) |
PRESS.
(Mpa) |
TEMP.
(ºC) |
PRESS.
(Mpa) |
TEMP.
(ºC) |
| C4.5-4.9/0.6 |
4.5 |
25 |
4.9 |
475 |
10 |
0.6 |
277.7 |
0.007 |
39.02 |
5.519 |
6000/3000 |
Double |
Temp. of boiler feed
water 105ºC |
| C15-3.43/0.981 |
15.5 |
150 |
3.43 |
435 |
115 |
0.981 |
295 |
0.0065 |
37.7 |
9.677 |
3000 |
Double |
Temp. of boiler feed
water 104ºC |
| C20-3.43/0.4 |
20 |
87.5 |
3.43 |
435 |
5+2.03 |
0.413 |
203.8 |
0.015 |
/ |
4.372 |
3000 |
Double |
Air cooling condenser |
| C25-2.85/0.981 |
20 |
125 |
2.85 |
445 |
40 |
0.981 |
315.7 |
0.007 |
39.02 |
4.981 |
3000 |
Double |
Temp. of boiler feed
water 105ºC |
| LOW PARAMETER INLET STEAM TYPE |
| C6-0.981/0.294 |
6 |
70 |
0.981 |
280 |
50 |
0.294 |
168.84 |
0.0065 |
37.7 |
11.67 |
3000 |
Double |
|
FACTORY ABILITY
| WORKSHOP |
|
| MECHINING EQUIPMENT |
|
| ASSEMBLY AREA |
| |
| HEAT TREATMENT PROCESS |
|
| ANALYSIS LABROTRY |
|
| ROTOR DYNAMIC BALANCE |
|
FAQ
1.
The he Model Select of steam turbine should according to the requirement of actual process and working condition, overload operating and low parameter running will affect the efficiency of steam turbine greatly;
2. Our port of loading is Qingdao seaport, P.R.China;
3. Our delivery time is from 5 to 7 months after we get the 30% deposit payment;
4. Our product warranty time is one year from delivery time;
5. Our common payment term is 30% of contract amount by T/T advanced as deposit, balance 70% before shipment by T/T or L/C at sight;
6. If your need the certificate that issue by a third party, please let us know;
7. We can provide field guide service during installation and debugging, but the user should pay the cost against international practice.
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